﻿CLASSIFICATION, 
  ETC. 
  OF 
  HAMILTON 
  AND 
  CHEMUNG 
  SERIES 
  101 
  

  

  15 
  Bryozoan 
  sp. 
  (rr) 
  

  

  16 
  Goniophora 
  chemungensis 
  (Van.) 
  Hall 
  (?) 
  (rr) 
  

  

  Only 
  one 
  specimen 
  and 
  that 
  smaller 
  than 
  the 
  normal 
  forms. 
  

  

  17 
  Stropheodonta 
  demissa 
  (Con.) 
  Hall 
  (?) 
  (rr) 
  

  

  18 
  Lyriopecten 
  tricostatus 
  (Van.) 
  Hall 
  (rr) 
  

  

  19 
  Schizodus 
  chemungensis 
  (Con.) 
  Hall 
  (rr) 
  

  

  20 
  (?) 
  Microdon 
  (Cypricardella) 
  sp. 
  (rr) 
  

  

  A 
  large 
  but 
  broken 
  specimen. 
  

  

  LXIX 
  B 
  4 
  . 
  For 
  some 
  distance 
  up 
  Bump's 
  creek, 
  above 
  the 
  gorge, 
  

   there 
  are 
  no 
  exposures; 
  but 
  about 
  one 
  and 
  three 
  fifths 
  miles 
  

   northwest 
  of 
  Afton 
  there 
  is 
  a 
  fair 
  outcrop 
  of 
  sandstones 
  and 
  

   bluish 
  to 
  olive 
  shales. 
  The 
  base 
  of 
  B 
  4 
  is 
  some 
  95 
  feet 
  higher 
  than 
  

   the 
  top 
  of 
  B 
  2 
  or 
  230 
  feet 
  above 
  the 
  Susquehanna 
  river, 
  and 
  10 
  feet 
  

   of 
  rocks 
  are 
  exposed. 
  The 
  top 
  of 
  the 
  exposure 
  is 
  at 
  the 
  highway 
  

   bridge 
  on 
  the 
  cross 
  road 
  just 
  below 
  the 
  dam. 
  One 
  irregular, 
  con- 
  

   torted 
  sandstone 
  layer 
  was 
  noticed, 
  as 
  well 
  as 
  a 
  calcareous 
  one 
  

   composed 
  largely 
  of 
  shells. 
  There 
  is 
  a 
  tendency 
  in 
  the 
  shale 
  to 
  

   split 
  across 
  the 
  bedding 
  as 
  well 
  as 
  along 
  its 
  plane 
  so 
  that 
  it 
  

   breaks 
  into 
  thin, 
  narrow 
  strips. 
  Fossils 
  are 
  common 
  specially 
  in 
  

   the 
  bluish, 
  somewhat 
  arenaceous 
  shales 
  to 
  thin 
  sandstones, 
  

   Spirifer 
  mucronatus 
  (Con.) 
  Bill. 
  var. 
  posterus 
  H. 
  & 
  C, 
  Liorhynchus 
  

   globulifornm 
  (Van.) 
  Hall 
  and 
  Productella 
  lachrymosa 
  (Con.) 
  Hall 
  

   being 
  the 
  most 
  abundant. 
  The 
  entire 
  list 
  follows: 
  

  

  1 
  Liorhynchus 
  gloluliformis 
  (Van.) 
  Hall 
  (c) 
  

  

  2 
  Productella 
  lachrymosa 
  (Con.) 
  Hall 
  (c) 
  

  

  3 
  Spirifer 
  mucronatus 
  (Con.) 
  Bill. 
  

  

  var. 
  posterus 
  H. 
  & 
  C. 
  (a) 
  

  

  4 
  Camarotoechia 
  congregata 
  (Con.) 
  H. 
  & 
  C. 
  (?) 
  (a) 
  

  

  These 
  specimens 
  are 
  rather 
  intermediate 
  between 
  the 
  above 
  

   species 
  and 
  C. 
  contractu 
  Hall. 
  

  

  5 
  Stropheodonta 
  demissa 
  (Con.) 
  Hall 
  (rr) 
  

  

  6 
  Microdon 
  (Cypricardella) 
  cf. 
  bellistriatus 
  (Con.) 
  (rr) 
  

  

  In 
  form 
  and 
  size 
  like 
  the 
  above 
  but 
  the 
  striae 
  are 
  like 
  those 
  

   of 
  M. 
  tenuistriatus 
  Hall. 
  

  

  7 
  Palaeoneilo 
  brevis 
  Hall 
  (rr) 
  

  

  8 
  Palaeoneilo 
  sp. 
  (rr) 
  

  

  